As officials from the World Health Organization urge people to stay indoors and practice social distancing to help prevent the spread of Covid-19, several schools globally have closed doors to students.

Speaking to Entertainment Tonight, The Late Late Show With James Corden host admitted, “The homeschooling thing is a nightmare,” as he gushed over the work school teachers do.

“My respect for teachers is through the roof. I mean, look, it’s here now,” he said, showing a mathematics textbook. “Honestly, I know nothing in here. I know nothing.”

Corden returned to screens in the TV special Homefest: James Corden’s Late Late Show Special, featuring celebrity friends from around the world performing for viewers via live stream.

The show, taped in Corden’s home garage, featured performances from stars including John Legend, Dua Lipa, and Billie Eilish and her brother Finneas, and ended with a message from the British funnyman, who admitted he was “overwhelmed with the sadness” amid the Covid-19 crisis.

“You feel so out of control. It feels so out of our comprehension, all of it. I found I get sort of overwhelmed with the sadness, really,” he explained. “It’s OK to feel anxious. The best thing we can all do is kind of breathe through that and put our minds in a positive place.”